ML19221A003

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Responds to 760712 Request for Addl Info Re Adequacy of Pressure Vessel Supports Under Loads Not Previously Considered.Low Probability of Pipe Rupture
ML19221A003
Person / Time
Site: Crane Constellation icon.png
Issue date: 08/31/1976
From: Arnold R
METROPOLITAN EDISON CO.
To: Vassallo D
Office of Nuclear Reactor Regulation
References
GQL-1250, NUDOCS 7905160479
Download: ML19221A003 (2)


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e, Your letter of Jtily 12, 1976 requested additional infor:ation evaluating the adequacy of the reacter pressure vessel suppcrts under loads not previcusly censidered. Since that tine, we have =e vith cther racccer L.c.,ccx,,eco users., an e.,.,crt to eva.,uate the concern and e,, -.

.i discuss pcssible resolutions.

'2We paths are being pursued in parallel to determine cur required actica.

'~he first apprcach is to undertake a review cf veri spenscred by a grcup cf utilities evaluating the absolute and relative probability of a pcst,ulated pipe break between the reacter vessel ncccie and the reactor cavity vall.

Science Applications, Inc. (SAI) is subnitting their results in the fcr= cf a tepical report in late August, 1976. The :iEC staff was introduced to the study in a presentation involving SAI cn vu y.;, _yi6.

Tne secccd approach is a review cf the additional infer ation requested in ycur July 12, Ic76 letter which requires a ecstly, nulti-year snal.vsis for each ;,lant.

Discussicts vitb Habecck & 'Jilecx and cther censulting firms, review of ACES hearings transcripts, and your letter itself indicates uncertainties in the present state-of-the-art analysis to evaluate thic particula' case.

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